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http://web.mit.edu/srumbley/Public/nzuri/
It has been tested in both Chrome and Firefox and should work somewhat effectively in those two browsersworks best in Firefox, and kind of works in Chrome. But Firefox works better so you should use that.
In this implementation, you should be able to manipulate the map, change the visibility of the two data set layers, click on various areas of the map to get more information, as well as add new wifi towers to the map. The sliders in the sidebar as well as the overlay/intersect buttons have not yet been implemented. The adding towers functionality also still needs some work, as do the info window popups on the map...we know, we know. ..:/